• Removes chlorine and chloramine instantly — safe to dose straight into new tap water or directly into a running aquarium.
• Detoxifies ammonia, nitrite and nitrate — the bound form stays non-toxic to fish for up to 48 hours while remaining available to your biofilter, so cycling isn't halted.
• Detoxifies heavy metals commonly found in tap water at typical concentrations.
• Non-acidic — won't push pH down the way some older conditioners do.
• Reef and invertebrate safe at the standard dose, and won't over-activate a protein skimmer.
• Extremely concentrated — a 50 mL bottle treats around 2,000 L; the 20 L drum treats around 800,000 L.

Every size is the same formula at the same concentration — the only difference is how long it lasts and the cost per litre of water treated. All sizes work out to well under 1c per litre at the standard dose; larger bottles cost a little less per litre again, which mostly matters if you're on a large system or dosing weekly.

• Standard: 5 mL (1 capful) per 200 L of new water. Each thread on the cap is roughly 1 mL, for dosing small tanks.
• High chloramine: a double dose (10 mL per 200 L) is safe.
• Ammonia or nitrite emergency: up to 5 times the normal dose (25 mL per 200 L) to detoxify a spike.
• Above 30°C with low chlorine or ammonia: use a half dose (2.5 mL per 200 L).
• Re-dose every 24–48 hours if ammonia or nitrite remain elevated.

• Suitable for: freshwater, marine and reef aquariums; new water and emergency ammonia/nitrite control; ponds at pond-appropriate dilution.
• Not suitable for: replacing regular water changes — Prime detoxifies, it doesn't remove waste from the system.

A sulfur-like smell after dosing is normal and not a sign the product has gone off. Standard liquid ammonia test kits can show a false positive after dosing, because Prime's ammonia bond isn't reversed by the Nessler reagent most kits use — a Seachem MultiTest Ammonia kit reads correctly. Keep out of reach of children.

Covered by your rights under Australian Consumer Law in addition to any manufacturer terms. Standard parcel freight.

Can I overdose Prime?

The emergency dose is up to five times the standard rate for ammonia or nitrite spikes, so a normal accidental overdose isn't dangerous. Very large deliberate overdoses aren't recommended.

Does Prime remove nitrate?

It detoxifies nitrate into a less harmful form for up to 48 hours, the same as it does with ammonia and nitrite — it doesn't strip nitrate from the system the way a nitrate-reducing media or water change does.

Will Prime affect my protein skimmer?

At the standard reef dose, Prime doesn't over-activate skimmers the way some older conditioners can.

Why does my tank smell slightly of sulphur after dosing?

That's a normal, harmless characteristic of Prime's chemistry — it isn't a sign the bottle has gone off.